var rob = function(nums) {
    if(nums.length === 0) return 0;
    if(nums.length === 1) return nums[0];
    if(nums.length === 2) return Math.max(nums[0], nums[1]);

    let dp = new Array(nums.length).fill(0);
    dp[0] = nums[0];
    dp[1] = Math.max(nums[0], nums[1]);

    for (let i = 2; i < nums.length; i++) {
      dp[i] = Math.max(dp[i-1], dp[i-2] + nums[i]);
    }

    return dp[nums.length - 1]
}

const arr = [1,2,3,1];
console.log(rob(arr)); // Output: 4